Section-liner.



No. 822,160. PATBNTED MAY 29, 1906. I o. s. SHILLING N A. I.. LINK. l

SECTION LINER. ff, ./@6 ,T- i

APPLICATION FILED FEB. 26, 1906. HIJ 7] Q ,l

@I WIW u'NI'rFDv srn'rns i FATFNT OFFIOF.

CARL s. sIIILL'INGr4 ANn ALvIA L. LINK, OF uniendo, ILLINOIS.

` SECTION-LINER.

Specification of Letters Patent.

Patented may 29, 1906.

Application mea February ze. 1906. sein No. 302,888.

To all whom it may concern:

Be it known that we, CARL S. SHILLING and ALVIA L. LINK citizens of the United States, residing at Chicago, in the county of Cook, in the State of Illinois, have invented certain new and useful Improvements in Section-Liners; and we do hereby declare that'the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it apertains to make and use the same, reference eing had to the accompanying drawings, which form part of this speciiication.

4Qur invention relates to improvements in section -liners for the use of draftsmen.

The object of our present invention is to provide a comparatively cheap, simple, and

,convenient section-liner havin a removable guide-plateI whereby the triang e, with which our invention is associated, can bereversed at pleasure for use upon either side and adapted to secure a uniform space in sectioning.

Our invention consists of a metallic guideplate havin a central longitudinal slot in which is sli ably mounted a two-part 'plate adjustably connected and adapted for a uniform measured longitudinal movement therein in spacing, the said guide-plate being removably mounted in the base of the triangle in which it is used.

The principal novel feature of our invention resides in the construction, Operation,

. plate an and coeration of the removable guideadjustable spacing means.

Similar parts are indicated by similar reference-numerals in the accompanying drawin s, in which;

igure 1 is a perspective view of our invention in position for use in connection with a T-square, broken away in part, the reversed position of the triangle being indicated by dotted lines. Fi 2 is an enlarged end viewof the guide-p ate, showing the manner of mounting' the spacing means therein. Fig. 3 is a plan view of our invention in position in the base of a triangle, broken away in part, the space for which the s acing means 1s adjusted being shown in otted outline.

The triangle 1 of the usual or other proper contour and dimensions, preferably made of celluloid, has a rectangular recess in its base, the ends of which recess are respectively provided with a transverse tenon 2. In this recess is removabl `mounted a metal guideplate 3 prefera ly of aluminium, whose position in the said recess, as shown in Figs. 6o

l and 2. The uide-plate has a limited vertical play in t e said recess, preferably of about one sixty-fourth of an inch, for the purpose hereinafter described.

The guide-plate 3 has a central longitudij 65 nal slot or recess 4 extending from one end nearly to the other end thereof, whose sides are provided with alongitudinal mortise 5,' adapted to receive the respective long itudi` nal tenons 6, Fig. 2, of the two-part spacing 7o means which is slidably and removably mounted therein. sists of a short plate 7, having a surmounted transverse lug 8, provided with a central' screw-threaded perforation, and a fing'er-A 75 Y lplate 9, having a friction-surface upon itsl upper face and provided with a surmounted .lug'lO, having lateral screw-threaded perforation in register with the said perforation in the lug 8, in which perforations is arranged a 8o screw 11, provided with a rigid milled nut 12 for operating the same.

The guide-plate 3 is provided at the upper right-hand corner and at the lower left-hand corner of the slot 4 with a scale 13, preferably 85- graduated to the thirty-second of an inch to enable the operator to adjust the s acin means to accurately measure the esire width of space in cross-sectionin This spacing means4 con- The Operation and manner ogemploying 9o our invention thus described is obvious and, briefly stated, as follows: The operator first spreads Orseparates the plates 7 and 9 by means of the adjusting-screw 11 until the distance between the outer end of the plate 7 95 .l

and the adjacent end of the slot 4 is equal to the desired space between the section-lines. This adjustment can conveniently b e effected either by inserting the point of a knife or v other instrument in the slot in the head of the Y roo screw or by grasping thefixed mit 12 with the fingers. He next properly locates his T- square 14 in a wellunderstood manner, against the farther edge of which he rests the base of the triangle 1 in use, thereby securely 1o 5 preventing any displacement of the guideplate 3. He then ushes the spacing means to the inner end of) the slot 4 and holds the plate 9 firmly upon the drawing-paper by s first two iin ers, which constantly remain 1 ro u on the friction-surface in use. The inc ined edge 15 ofthe triangle guides his drawtion of each cross-'section line, referring now the relative ,the d to Figs. v1 and 2, he slides, the s acing means to the left to its full limit, or tle distance of which he slides the triangle 1 its limit of movement to the left, which is necessarily the same as that of the plate 9. The beforementioned playof Ithe tenons4 6 in the guiding-mortises 5 permits the free sliding movement of the triangle 1 and the guide-plate 3v when the spacing-plate 9 is held down firmly upon -the paper without the least tendency toward bindmg therein. When it is desired to employ the triangle in the position shown in dotted outline in Fig. 1, with the inclined or ruling edge of the triangle to the left, the operator .without disturbing the T- square simply removes the guide-plate, with its Spacing means, inverts the triangle, and then replaces the guide-plate and spacing means in position shown in Fig. 1, after which he consecutively slides the spacing means and the trian le tothe right, as above described, instead o? to the left.

It' is obvious that our invention is thus cheap, simple, reliable, easily adjusted, and

` convenient in use and by means of the vertione of them is cal play between the spacing-plates and the base-plate a perfect freedom of movement between these lates is secured when either iiimly held upon the drawing- Both sides of the plate 9 may be paper.

n-surface, if desired, to

provided with a rictio esired space between the lines, afterv secure a better holding contact with per-surface.

Having thus described our invention' and desire to secure by Letters Patent is- 1. A section-liner consisting of a triangle j a longitudinally-slotted guide-plate removably mounted in the base of the triangle;a spacingmeans slidably mounted in the slot of the guide-plate and consisting of a pair of latesin horizontal alinement; and means .or adjustably connecting the said plates, which have a limited vertical play in their bearings for the purpose-described.

2. In a section-liner the combination of a triangle, a guide-plate removably mounted in the base of the triangle and having a longitudinal'slot therein for the spacing means; a

ruary, A. D. 1906.

' CARL S. SHILLING. ALVIA L. LINK. Witnesses:

Mrs. A. MILLER,

KATHLEEN J. GILLIAM.

the manner of employing the same, what we pair of .spacing-plates in horizontal aline- 

